JPS5787616A - Amplifying circuit - Google Patents

Amplifying circuit

Info

Publication number
JPS5787616A
JPS5787616A JP55164441A JP16444180A JPS5787616A JP S5787616 A JPS5787616 A JP S5787616A JP 55164441 A JP55164441 A JP 55164441A JP 16444180 A JP16444180 A JP 16444180A JP S5787616 A JPS5787616 A JP S5787616A
Authority
JP
Japan
Prior art keywords
capacitor
resistor
inverting input
input terminal
current flows
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP55164441A
Other languages
Japanese (ja)
Other versions
JPS6218088B2 (en
Inventor
Nobuo Fujiwara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP55164441A priority Critical patent/JPS5787616A/en
Publication of JPS5787616A publication Critical patent/JPS5787616A/en
Publication of JPS6218088B2 publication Critical patent/JPS6218088B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier

Abstract

PURPOSE:To achieve high frequency filter characteristics, by providing a resistor between an inverting input terminal and output terminal and a capacitor between a feedback circuit and the inverting input terminal. CONSTITUTION:When the gain of an amplifier 1 is sufficiently large, since an inverting input terminal can be at imaginary ground potential, no current flows into it. The input current flows to a feedback resistor R7 and an input capacitor C3 by i1, i2 respectively. As a result, the input and output characteristics are those passing through a high frequency filter. In this case, the cut-off frequency is determined by the capacitor C3, resistors R6, R7, R8, and the capacitance of the capacitor C3 can be made small by selecting the value of the resistor R8 suitably.
JP55164441A 1980-11-21 1980-11-21 Amplifying circuit Granted JPS5787616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55164441A JPS5787616A (en) 1980-11-21 1980-11-21 Amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55164441A JPS5787616A (en) 1980-11-21 1980-11-21 Amplifying circuit

Publications (2)

Publication Number Publication Date
JPS5787616A true JPS5787616A (en) 1982-06-01
JPS6218088B2 JPS6218088B2 (en) 1987-04-21

Family

ID=15793217

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55164441A Granted JPS5787616A (en) 1980-11-21 1980-11-21 Amplifying circuit

Country Status (1)

Country Link
JP (1) JPS5787616A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59133745A (en) * 1983-01-20 1984-08-01 Matsushita Electric Ind Co Ltd Optical receiving circuit
JP2008219699A (en) * 2007-03-07 2008-09-18 Hitachi Metals Ltd Low-noise amplifier circuit, high-frequency circuit, high-frequency component, and communication device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59133745A (en) * 1983-01-20 1984-08-01 Matsushita Electric Ind Co Ltd Optical receiving circuit
JP2008219699A (en) * 2007-03-07 2008-09-18 Hitachi Metals Ltd Low-noise amplifier circuit, high-frequency circuit, high-frequency component, and communication device

Also Published As

Publication number Publication date
JPS6218088B2 (en) 1987-04-21

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